Weber, L., Frebel, M., and Boese, R. (1987). [1+ 4] Cycloaddition of a Diphosphene to Acrolein: Synthesis and Structure of a Dihydro-1,2λ5-oxaphosphole with an Exocyclic P = P Bond. Angewandte Chemie International Edition in English 26, 1010-1011.

Weber, Lothar, Frebel, Matthias, and Boese, Roland. “[1+ 4] Cycloaddition of a Diphosphene to Acrolein: Synthesis and Structure of a Dihydro-1,2λ5-oxaphosphole with an Exocyclic P = P Bond”. Angewandte Chemie International Edition in English 26.10 (1987): 1010-1011.